Suggest a continuous mission system

I’m sorry that my English level is not good, so I can only rely on translation software to ask.
I’m thinking about whether we can have a continuous mission system.For example, one mission must be completed to obtain another mission. This way I can get a complete story line .And I am curious if I can edit the plot of the mission in the next version.Thanks a lot.
p.s:The players around me very much hope to get a function that can save their own edited models, so that they don’t have to re-edit their favorite characters in another game.
As a mmorpg player, I really like this game very much, it has stay me up for two nights.